Pump bearing fault diagnosis method

A fault diagnosis and pump bearing technology, applied in measuring devices, instruments, character and pattern recognition, etc., can solve problems such as misjudgment and cannot be effectively identified, and achieve the effect of eliminating high-frequency interference, convenient operation and good stability

Pending Publication Date: 2020-04-21
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Embodiment

[0036] like figure 1 As shown, the embodiment of the present invention discloses a method for pump bearing fault diagnosis, comprising the following steps:

[0037] The signal detection module collects the vibration signal, and eliminates high-frequency interference through the conditioning circuit;

[0038] Decomposing the collected fault signal multiple times, once decomposing to obtain a baseline signal and an inherent rotation component, extracting the RMS of a plurality of said inherent rotation components (PCRs) as the feature value to form the fault characteristic data set X under the rotation frequency, Wherein, the decomposition of the fault signal adopts the intrinsic time scale decomposition (ITD) method;

[0039] Perform normalization processing to described fault characteristic data set, and construct fault classification model and carry out pattern recognition to bearing fault signal, wherein, described pattern recognition comprises training stage and recognitio...

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Abstract

The invention provides a pump bearing fault diagnosis method, which comprises the following steps of: obtaining a vibration signal through a signal detection module, and eliminating high-frequency interference through a conditioning circuit; normalizing the obtained data, decomposing the fault signal of the pump unit by adopting an inherent time scale decomposition method, obtaining a baseline signal and an inherent rotation component by one-time decomposition, and extracting RMS of a plurality of inherent rotation components as characteristic values to form a fault characteristic data set under the rotation frequency; repeating the operation under different faults of the bearing to obtain a fault sample data set X; taking the data set X as the input of LIB-SVM, and constructing a fault classification model to carry out the mode recognition of a bearing fault signal; establishing a bearing fault database. The method for analyzing the current and voltage signals of the motor has the advantages of being convenient to operate, flexible to install and good in stability.

Description

technical field [0001] The invention relates to the technical field of fluid machinery monitoring, in particular to a pump bearing fault diagnosis method. Background technique [0002] The structure of the pump is complex, and it works under the harsh conditions of high temperature and high speed, coupled with the influence of various random factors, it is prone to various mechanical failures, which reduces its function. Once the pump fails in the production system, it will cause a chain reaction, which will seriously cause equipment damage and even the production system to be paralyzed, unable to work normally, and cause huge economic losses to the enterprise and society. [0003] In the prior art, CN103758742B discloses a plunger pump fault diagnosis system based on dual-type feature fusion diagnosis. The system converts the vibration signal of the pump into an electrical signal through an acceleration sensor, and uses a dual-type feature extraction method to extract the w...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62G01M13/045
CPCG01M13/045G06F2218/12G06F18/214G06F18/2411G06F18/2451
Inventor 李志国王秀礼朱荣生付强赵媛媛将夏飞高鹏涛谢亚杰
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH
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